Process
Decision Program Chart (PDPC)

The Process Decision Program Chart (commonly
abbreviated to the less unwieldy PDPC) provides a simple method to help in
identifying both risks and countermeasures.

Quite simply, if the plan is displayed diagrammatically
(typically in a Tree Diagram), then identified risks and countermeasures
are added in subsequent boxes, as below. This may appear to be quite
trivial, but as with many other tools, the construction and thought
involved is as important as the final diagram.